Feature Request: Add Cmd + . to Toggle Sidebar for Fast Focus Mode

[razaanstha]

It would be great if Payload added a keyboard shortcut — Cmd + . (Mac) / Ctrl + . (Win) — to toggle the left sidebar. A lot of applications like Figma use this as a focus-mode toggle. It helps remove distractions fast. In Payload, this would make it easier to hide the sidebar and focus fully on the content/editor area, especially when working with long or complex collections.